Good morning
I have 2 mature copper beech trees 30+ yr old and over 30'high, this year one of them is infested with whitefly on the underside of the leaves - the other at the moment is clear, as I am worried about spread to my adjacent tomatoes, lettuces and veg garden and other shrubs etc., is there a way to control the pest (spraying on this scale would be a bit difficult)
regards
Tony

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